Novel soluble and optically active polyimides containing axially asymmetric 9,9 '-spirobifluorene units: Synthesis, thermal, optical and chiral properties

	Novel soluble and optically active polyimides containing axially asymmetric 9,9 '-spirobifluorene units: Synthesis, thermal, optical and chiral properties
	Wu ZL ; Han BC ; Zhang CH ; Zhu DY ; Gao LX ; Ding MX ; Yang ZH
刊名	polymer
	2012
卷号	53 期号:25 页码:5706-5716
关键词	FLUORINATED POLY(ETHER IMIDE)S DIFFERENT PENDANT GROUPS AROMATIC POLYIMIDES TARTARIC ACID SIDE-GROUPS MEMORY CHARACTERISTICS CHIROPTICAL PROPERTIES LIQUID-CRYSTALS RUBBED FILMS MAIN-CHAIN
ISSN号	0032-3861
通讯作者	yang zh
中文摘要	a new optically active spirobifluorene-based diamine monomer, (r)-2,2'-bis(4-amino-2-trifluoromethylphenoxy)-9,9'-spirobifluorene, was synthesized using (r)-2,2'-dihydroxy-9,9'-spirobifluorene as starting material. the absolute stereochemistry of the chiral diamine was determined by single crystal xray diffraction. a series of novel chiral polyimides were prepared from the diamine with various aromatic dianhydrides via a two-stage process with chemical imidization method. all these optically active polyimides were readily soluble in many organic solvents and could afford flexible, tough and transparent films with an uv vis absorption cutoff wavelength at 351-375 nm. the glass transition temperatures of these polyimides were recorded between 262 and 281 degrees c by differential scanning calorimetry, and the 5% weight loss occurred at temperatures above 510 degrees c. the specific rotations of these chiral polyimides ranged from -48.5 degrees to +73.0 degrees depending on the structures of the aromatic dianhydrides. all the optically active polyimides exhibited high chiral stability in solid state or in dmac solvent at high temperature due to introduction of chiral spirobifluorone group into polymer backbones. the circular dichroism (cd) spectroscopic properties of these chiral polyimides in tetrahydrofuran solutions were also studied. (c) 2012 elsevier ltd. all rights reserved.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000311818900012
公开日期	2013-03-18
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/47823]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Wu ZL,Han BC,Zhang CH,et al. Novel soluble and optically active polyimides containing axially asymmetric 9,9 '-spirobifluorene units: Synthesis, thermal, optical and chiral properties[J]. polymer,2012,53(25):5706-5716.
APA	Wu ZL.,Han BC.,Zhang CH.,Zhu DY.,Gao LX.,...&Yang ZH.(2012).Novel soluble and optically active polyimides containing axially asymmetric 9,9 '-spirobifluorene units: Synthesis, thermal, optical and chiral properties.polymer,53(25),5706-5716.
MLA	Wu ZL,et al."Novel soluble and optically active polyimides containing axially asymmetric 9,9 '-spirobifluorene units: Synthesis, thermal, optical and chiral properties".polymer 53.25(2012):5706-5716.